" 9."(x)/(a^(2)+x^(2))

lim_(xto3)(x^(2)-9)/(x^(2)(x^(2)-6x+9))

sqrt(9^(4x^2))=? (a) 9^(2x) (b) 3^(2x^(2)) (c) 3^(2x) (d) 9^(2x^(2))

int((2x+9))/((x+2)(x-3)^(2))dx

Factorise : 9(x-y)^(2) - (x+2y)^(2)

Evalutate : int (x ^(3) +3x ^(2)+x+9)/((x ^(2) +1) (x ^(2) +3))dx.

Evalutate : int (x ^(3) +3x ^(2)+x+9)/((x ^(2) +1) (x ^(2) +3))dx.

The lengths of the sides of an isosceles triangle are 9 + x^(2), 9 + x^(2) and 18 - 2x^(2) units. Calculate the area of the triangle in terms of x and find the value of x which makes the area maximum.